Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5233a88ee24db8…

MALICIOUS

PDF

78.0 KB Created: 2020-11-14 10:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 10139975573361adc09f57038ad8356b SHA-1: 188c3aca100590297b077095b556fda299e4d243 SHA-256: ea5233a88ee24db82fbe1a49ea75e25442a26e3cc327bec293d686e414ef7393
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely serving as a phishing lure or a download redirect. The document body, though partially corrupted, suggests a financial context, which is a common theme in phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/strik?utm_term=determine+the+machine%2525E2%252580%252599s+second-year+depreciation+using+the+double-declining-balance+method PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f9ae86285d84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f97c31d176e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a1d0d3cd-0a63-4db4-af7d-ba6c57bc20e2/pawixuvukok.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/magazine_design_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c6ebc4-4b49-4e9b-8b79-549ecea75c71/five_relationships_of_filial_piety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f64795-3b84-4230-97c0-7724566ef4e0/quantum_physics_for_dummies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1819e6b9-70e3-4a8b-805b-993830027729/31776006488.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/87773491237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431d3977-cf3d-47fb-b4af-ba5df5a74736/tomowinamegekadis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070e2345-a2e3-445b-9edf-3bbb4fa93a7f/22803696087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16034b86-05fc-4fa0-85a7-8f3cd940cc1e/muniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e550c61b-da0f-43ad-a0d3-acd6294ab7c3/powupijesokabibuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176c9a12-e2d8-426d-a338-8e7fcee179c7/trippie_redd_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048ebe25-287f-432e-a9e3-7f090d3a518a/gta_san_andreas_cheats_ps2_ferrari_car.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/towonukaviwasexigojitufi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 5728 bytes
SHA-256: 34fba0ad696e236e1f4cb30a27e9281633b67934505c214d7ae7281612cf4cef
font_01_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 10472 bytes
SHA-256: 24ffe2244758367e55976ca0a67c2be48432bc4968b11994576f5e1f56f43d38
font_02_sfnt_off000117f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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